CITY OF KEMMERER, WYOMING

REQUEST FOR PROPOSALS

HVAC AND DOMESTIC WATER SYSTEM UPGRADES FOR THE

KEMMERER RECREATION CENTER

Proposals Due:

No later than 5:00pm, February 19th, 2021

Send To:

BRIAN MUIR, CITY ADMINISTRATOR

KEMMERER CITY

220 WYOMING HIGHWAY 233

KEMMERER, WY 83101

BMUIR@KEMMERER.ORG

ADMINISTRATIVE INFORMATION AND CONDITIONS FOR SUBMITTAL

Purpose

Proposals are being solicited from qualified trade professionals/contractors with the expertise needed to install and provide construction design for HVAC and domestic water systems for the 18,000 square foot Kemmerer Recreation Center located at 1776 Del Rio Drive, Kemmerer, WY 83101.

Proposal Conditions

1. Primary Contact

Any questions relating to this RFP and specifically the work required as part of this request shall be directed to Brian Muir, Kemmerer City Administrator, bmuir@kemmerer.org or via phone at 307-828-2350. No submitting Contractor shall contact any City representative other than Brian Muir for purposes related to this proposal, on or after the date of publication of this RFP.

2. MANDATORY Site Meeting/Proposal Submittal Deadline and Procedure

A mandatory pre-proposal meeting will be held at the project site 1776 Del Rio Drive, Kemmerer, WY 83101 on Friday, 5th , 2021 at 1:30 p.m. local time. This meeting will provide contractors the opportunity to view, photograph and measure all necessary areas of the building required for the efficient and accurate construction design of the HVAC and domestic water systems. In order to ensure accurate construction design proposals will only be accepted from firms that attend this meeting.

The packaged proposal (including all hard and electronic copies) shall be submitted to the City of Kemmerer by 5:00 pm local time on February 19th, 2021 in a sealed envelope clearly marked as follows:

ATTN: Mr. Brian Muir, City Administrator

Kemmerer City Hall 220 Wyoming Highway 233 Kemmerer, WY 83101

Email: bmuir@kemmerer.org

Response to Kemmerer Recreation Center, Heating and Domestic Water Upgrades RFP

Proposals received after the deadline may remain unopened and may not be considered. Should there be delivery delays of the hard copies beyond the control of the submitter, the electronic copy delivery date and time may meet the deadline requirements, provided the date the hard copies were shipped or mailed is at least one business day before the submittal deadline date.

3. Exclusion

No oral, fax, or telephone proposals shall be considered. Emailed proposals will be accepted in “pdf” file format which print out as described below without alteration to the file. File formats which do not print out as identified below in Section 4 may be rejected. The City of Kemmerer will not be responsible for formatting and arranging files to view correctly.

4. Proposal Construction

Each proposal shall contain no more than thirty (30) 8.5”x 11” pages with printing on one side only, including cover letters, tables of contents, resumes or any pre-printed or other promotional material included with the proposal, whether bound or unbound. Any pages left blank, front and back decorative cover and section dividers shall not be included in the page count.

5. Proposal Contents

Each proposal shall include, at a minimum, the following:

a. Cover letter

Limited to one (1) page, create a cover letter that succinctly explains the Contractor’s interest and qualifications for the project and contains the name, address, phone number and email address of the principal contact person.

b. Qualifications of the Contractor

Describe the Contractor’s qualifications and relevant or related experience. One overall team should be proposed even when separate subcontractors are proposed. Include the location of the Contractor’s home office and the location(s) where services will be performed.

Include a list of related projects that the Contractor has started and completed in the last ten (10) years. Identify the year range of each project, the owner’s contact person and telephone number. Projects which are referred to as having been accomplished by your firm shall be projects which were managed by personnel who are currently on your staff.

c. Names and Qualifications of Project Team

A current resume for professional persons who would be working on the design, which includes a description of qualifications, skills and current workload/availability. Identify each person’s role on the construction design and build effort. At a minimum, resumes for the project manager, primary technical and mechanical designers must be included.

List any outside Contractors who may perform services for this project. Describe what services each outside Contractor would provide.

d. Strategy and Implementation Plan

-Describe your interpretation of the objectives with regard to this RFP.

-Describe your proposed strategy and/or plan for achieving the objectives of this RFP.

-Proposer may utilize a written narrative or any other printed technique to demonstrate the ability to satisfy the scope of services. The narrative should describe a logical progression of tasks and efforts starting with the initial steps or tasks to be accomplished and continuing until all proposed tasks are fully described and the RFP objectives, scope of work, and deliverables are accomplished. Include a detailed time schedule for completion of the project.

e. References

A list of at least (3) references for projects of similar size and scope, including at least two (2) references for projects completed during the past six (6) years.

Include the name of the organization, a brief summary of the work, the cost of the project and the name and telephone number and/or email address of a responsible contact person.

f. Cost Breakdown

Provide a breakdown of all costs estimated for completion of the project. Refer to Section 11.D. for specifics on the proposed budget.

6. Copies of Proposal

Interested Contractors must submit eight (8) complete hardcopies of their proposal.

7. Altering Proposals

Proposals cannot be altered or amended after they are received by the City of Kemmerer.

8. Confidential Information

All materials submitted in response to this RFP shall ultimately become public record. Any material to be treated as confidential or proprietary in nature must be clearly identified with the words “Confidential Disclosure,” placed in a separate envelope, and shall include a justification for the request. Note that confidential materials shall be included in the page count. Neither cost nor pricing information nor the total proposal shall be considered confidential or proprietary.

9. Material Ownership

All proposals and related materials become the property of the City of Kemmerer upon receipt and shall not be returned to the proposer. The City of Kemmerer shall have the right to use all ideas or adaptations of the ideas contained in any proposal received in response to this RFP, subject to the limitations outlined in the section titled “Confidential Material.”

10. Right to Cancel

The City reserves the right to cancel the RFP at any time when it is in the best interest of the City of Kemmerer. The City of Kemmerer also reserves the right to accept or reject any and all submitted responses to the RFP. State statute and funder guidelines do not require the City of Kemmerer to accept the lowest priced proposal.

11. Authorization to Begin Work

Notice to proceed will be given to the Contractor as soon as the contract is approved and signed by all parties and returned to the City of Kemmerer.

II. SCOPE OF WORK

A. Background

The Kemmerer Recreation Center was built in the early 1980’s and currently uses 2- 400,000 BTU boilers for heat, which is circulated through 5 heat exchangers with pneumatic controls. No air conditioning is currently provided. Currently problems develop with the control system not being able to adequately modulate heat to the various heat exchangers / zones. The age of all components, including the domestic water system, is also an issue as well as efficiency.

B. Project Goals

The desired outcome of this project will be a construction design and project completion including all necessary equipment specification, quantities, locations and project diagrams needed to remove the old system and install the new system from beginning through completion and satisfactory operation.

C. Project Tasks and Deliverables

It is expected that the Contractor will meet the following deliverables. The proposal must clearly articulate how the project’s goals, tasks and deliverables will be met within the time and budget allotted. All materials collected or created by the selected Contractor become the property of the City of Kemmerer.

1. Deliverables

a. Construction design plans, specifications, and diagrams.

b. Removal of all or part of the old HVAC system and domestic water components.

c. Installation of the new HVAC system specified in preferred design.

D. Project Timeline and Deadlines

The effort is anticipated to begin on or soon after March 15th, 2021

An approximate timeline for project phases and completion follows:

January 27th, 2021: HVAC and Domestic Water System RFP published

February 5th, 2021: Mandatory Site Visit—may be rescheduled due to weather conditions.

February 19th ,2021: Deadline for Submission of Proposals by no later than 5:00pm local time.

February 22nd , 2021 -- February 26th, 2021: Proposal Review and Selection Process

March 8th ,2021: Contract Award at Kemmerer City Council Meeting

March 15 – August 15, 2021: Construction begins to substantial completion of the project.

September 15, 2021: Project close out, all documentation, owner training, etc., completed.

Ill. CONTRACTOR SELECTION

A. Selection Committee

A Selection Committee consisting of three (3) to five (5) members will be appointed by the City of Kemmerer to evaluate the proposals received. The Selection Committee members will independently review and score all proposals based upon selection criteria. The Selection Committee will then meet to discuss the proposals and comments from each member. The final score for each proposal will be determined by taking the average of all Selection Committee member scores. If necessary, the Selection Committee will prepare a Contractor short list of the top-ranked proposers. The Selection Committee may conduct either phone or oral on-site interviews to complete the Contractor selection process; however, the Selection Committee reserves the right to make a selection based solely upon the proposal received.

The members of the Selection Committee shall not be disclosed to submitting Contractors. No submitting Contractors shall contact any City representative other than Brian Muir for purposes related to this proposal, on or after the date of publication of the notice.

B. Contract Award

After the selection of a Contractor and review and approval by the City Council a contract will be awarded.

IV. Technical Report and Scope and Work

The technical report and scope of work was created by an engineering HVAC firm that specifies in more detail the construction options for this project in order to guide Contractors in their development of their proposed bids. Below is also an outside diagram of the Kemmerer Recreation Center, followed by the table of contents and report, equipment table, and an acceptable alternatives addendum.

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Table of Contents 1. INTRODUCTION ................................................................................................................................ 8 2. RFP RECOMMENDATIONS .................................................................................................................. 8 3. AVAILABLE ENERGY INCENTIVES ....................................................................................................... 8 4. EXISTING STATUS ............................................................................................................................ 9

4.1. Distribution Systems .................................................................................................................. 9 4.2. Boilers ...................................................................................................................................... 9 4.3. Air Handling ............................................................................................................................ 10 4.4. Fan Coil Units .......................................................................................................................... 10 4.5. Domestic Water Heaters .......................................................................................................... 10 4.6. Water Quality .......................................................................................................................... 11

5. SUMMARY OF CONCERNS WITH EXISTING SYSTEMS ......................................................................... 11 6. ANALYSIS AND CALCULATIONS ........................................................................................................ 12

6.1. Zoning and Load Calculation ..................................................................................................... 12 6.2. Domestic Hot Water ................................................................................................................ 14

7. TECHNICAL PROPOSAL AND SYSTEM OPTIONS ................................................................................. 15 7.1. General .................................................................................................................................. 15 7.2. Distribution ............................................................................................................................. 16 7.3. Water Treatment Selection ....................................................................................................... 16 7.4. Boiler Options ......................................................................................................................... 18

7.4.1. Low Cost Option ............................................................................................................... 18 7.4.2. Medium Cost Option ......................................................................................................... 19 The Lochinvar Noble Combi Boiler is a multi-material connector that allows any piping material to connect to the boiler directly without the needs of an adapter. The fire tube design has a higher heat transfer coefficient than traditional heat exchangers. It is commercial grade construction and has a rugged design for improved reliability and is typically used in small- to medium-sized facilities. ................................... 19 7.4.3. High Cost Option .............................................................................................................. 19

7.5. Domestic Hot Water Heater Selections ...................................................................................... 20 7.5.1. Circulating Pumps............................................................................................................. 20

8. APPENDICES ................................................................................................................................... 21

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1. INTRODUCTION Kemmerer Recreation Center is a 2 story, 18,000 sq ft recreation center serving the community of Kemmerer, WY. It was built in the mid 80’s and has never had a major renovation of its mechanical systems for heating, ventilation or plumbing systems in that time. This report is intended outline the technical requirements for this RFP which will allow City of Kemmerer to go out to bid for this work in a complete or logically phased approach.

2. RFP RECOMMENDATIONS This document describes good practice procedures for improving the energy efficiency of the Recreation Center’s mechanical systems which will meet the requirements for obtaining incentives. Outside of the scope outline herein, we’d recommend the following items for inclusion in the final RFP:

Include allowance for making good penetrations within the architectural finishes and performing repairs.

This document describes minimum requirements and is not a complete design. As such the delivery method is assumed to be Design-Build by the successful bidder and they will need to develop construction and permit level plans and secure necessary permits.

The RFP should include a scoring mechanism which does not only include lowest initial cost, but also the design and construction approach, project team and similar project experience and long term cost benefits.

3. AVAILABLE ENERGY INCENTIVES Wyoming public buildings have access to a few incentives and grants. Depending on the timing, scope and delivery method, the successful team will be responsible for working with the City to define, determine and develop the applicable incentive and grant monies and programs and assist the City in securing them.

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4. EXISTING STATUS The following section describes the current known status of the equipment serving the recreation center.

4.1. Distribution Systems

It was noted in the kW to replace pipework. Typical Pipe & Supports Economic Lifespans are as follows:

Copper – 45 years Steel (closed) – 35 years Ductile Iron Drainage – 40 years

The existing pipework is 35 years in operation, so steel pipes are ready for assessment however no failures or leaks have been mentioned. There has been concern over scaling in the Domestic Hot Water (DHW) pipes impacting flow to the bathroom fixtures. Ductwork has a typical economic lifespan of 40 years. Building controls are utilizing a pneumatic system.

4.2. Boilers

Two cast iron atmospheric boilers provide heating to the Air Handling Units (AHUs) sand Fan Coil Units (FCUs). The heating hot water (HHW) is circulated through the building using two constant-speed pumps. These boilers are around 85% efficient in operation and have reached the end of their typical economic lifespan.

Model Quantity Fuel Type Pump Type

Weil McLain Model LGB Series 2

2 Natural Gas Constant-Speed Pumps

Table 1 Boiler Specs

(a) (b) Figure 1 Pictures of a) Existing Boilers and b) Name Plate

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4.3. Air Handling

Two constant air volume air handling units (AHUs) provides ventilation & heating only. The AHUs are servicing the following zone:

AHU-1: Multi-Use Gym and the running track located in the gym area AHU-2: Racquetball court, Weightlifting room, Rock Climbing and Cardio room.

The air handling units are at the end of their economic lifespan.

AHU # Make Model Model Number

AHU-1 Johnson Controls York Solution XT XTI-051X054-EAJA017A

AHU-2 MarkHot NA NA Table 2 Make and Models for Existing AHUs-Kemmerer Recreational Center

(a) (b) (c) Figure 2 Pictures of a) Existing AHU-1, b) the Variable Frequency Drive (VFD) Device, and c) The Name Plate

(a) (b) Figure 3 Pictures of a) AHU-2 and b) Name Plate

4.4. Fan Coil Units

Seven heating hot water Fan Coil Units (FCUs) serve the following spaces:

Office and lobby (a door heater is also noted) Corridor Yoga room Men and Women Locker/Shower rooms (3 units)

4.5. Domestic Water Heaters

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For domestic hot water, 2 natural gas-fired storage heaters found in the boiler room are used for hot water generation throughout the whole building. The water heaters are both American Water Heater Model CG32100T774NOV with an input of 75100 BTU/HR and with capacity for 72.82 GPH of hot water. There is also a Grundfos domestic hot water circulating pump. Pneumatic controls are currently being used. Water pressure was determined to be 75-80psi.

(a) (b) Figure 4 Pictures of a) Existing Domestic Water Heaters and b) Name Plate

4.6. Water Quality

The incoming water quality levels was obtained from the city’s water department and is reported to between 9-14 grains per gallon (gpg). The water quality is deemed safe for consumption though it is hard .

5. SUMMARY OF CONCERNS WITH EXISTING SYSTEMS Pneumatic controls are near end of their life cycles and are no longer typical for maintenance The hot water heaters are near the end of their lifespan. The boilers are near the end of their lifespan and are inefficient compared to current standards. Scaling has been an issue in the shower rooms and has caused damages to the fixtures. Hot water takes excessive time to reach the fixtures. Pumps are near the end of their lifespan AHUs are near end of their lifespan Cooling is desired for gym, racquet ball court, rock climbing, weightlifting, machine rooms and running

track due to warm temperatures during summer. FCUs are near the end of their lifespan

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6. ANALYSIS AND CALCULATIONS The existing building has been analyzed using the software IES Virtual Environment following information received from the City of Kemmerer. This analysis has been conducted to determine the proper sizing and hence selection of replacement equipment for HVAC systems.

6.1. Zoning and Load Calculation

A thermal zoning plan was created to help set up the simulation model using the IESVE tool. This model calculates the heating and cooling demand for the building spaces and to understand what areas show a need for heating and/or cooling. The zoning map and results are shown below:

Figure 5 Zoning Plan

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KEMMERER HEATING AND COOLING LOADS

Zone Area (SF) Sensible Cooling Load

(BTU/H) Sensible Heating Load

(BTU/H)

Multi-Use Gym Space 7108 223403 85835

Running Track 2004 78708 37701

Racquetball Court 720 11641 4981

Weightlifting Room 756 23273 4274

Rock Climbing Room 756 26534 4252

Cardio Room 756 22787 4645

Corridor East 1280 6775 5110

Corridor West 508 3275 3905

Office 172.5 2807 3264

Lobby/Desk 832.9 58180 20648

Women's Locker Room 456 6008 3290

Men's Locker Room 600 8089 4543

Spa Area 406 5685 3778

Vestibule 1 50 315 316

Vestibule 2 50 305 311

Yoga Room 624 19575 6912

Elevator Lobby 136 1145 1581

Stairs 252 5481 12134

TOTAL 17985.4 503986 207480

Table 3 Summary of heating and cooling loads for each space and building’s total heating and cooling load

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6.2. Domestic Hot Water

To determine the selection of the Domestic Hot Water Heater and Water Treatment, we must first determine the total Water Supply Fixture Unit (WSFU) of all plumbing fixtures and the total flow.

Water Demand

Fixture Quantity WSFU CW HW

Shower 3 2 6 6

Women’s Restroom

Lavatory 1 1 1 1

Water Closet 2 Flush Valve 70

TOTAL 77 7

Men’s Restroom

Shower 1 2 2 2

Water Closet 1 Flush Valve 40

Lavatory 1 1 1 1

TOTAL 43 3

Janitor Mop Sink 1 3 3 3

General Area Drinking Fountain

2 0.5 1

TOTAL WSFU IN BUILDING 134 23

GPM 76 16 Table 4 Water Demand for all plumbing fixtures with water supply fixture unit (WSFU) and total flow for hot and cold water

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7. TECHNICAL PROPOSAL AND SYSTEM OPTIONS 7.1. General

The technical scope of work describes the complete work necessary by the successful team, however based on the survey carried out to date and the phasing, the City of Kemmerer recommends the following prioritization in terms of systems and importance:

1. Domestic water heating system—Primary Phase 1.1. Include water softening system (see options below) 1.2. Install new domestic hot water equipment and accessories 1.3. Chemically descale and flush existing pipework 1.4. Install new low flow fixtures throughout 1.5. Alternate: Replace existing pipework and insulation 1.6. Alternate: Provide local recirculation pump 1.7. Test, rebalance and commission the system

2. Heating hot water system—Primary Phase 2.1. Include 2 new high efficiency boilers with BMS integration (Good, Better, Best options) 2.2. Replace pneumatic controls with DDC system that is not vendor exclusive or proprietary and has

multiple authorized support contractors within the immediate geographic region 2.3. Test, rebalance and commission the system

3. Air Handling Units—Alternate 1 3.1. Replace two air handlers which can maximize outdoor air ventilation capabilities. New, larger roof

openings may be required. (Basic of design units provided in attached equipment table) 3.2. Air handlers selected should have space/consideration for future DX cooling if not included 3.3. Add Alternate to Alternate 1: Install condensing unit on roof and DX coils in AHU’s with necessary

plumbing, structural, electrical, etc. 3.4. Clean and repair ductwork as needed. 3.5. Test, rebalance and commission the system

4. Fan Coil Units –Alternate 2 4.1. Replace HHW Fan Coil Units in all areas except front office and lobby. (Basis of design units

provided in attached equipment table.) 4.2. Cap HHW towards lobby and main office and replace existing Fan Coils with DX Heat Pumps or

VRF System with BMS integration. (Basis of design units provided in attached equipment table.)

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7.2. Distribution

Insulation Values

7.3. Water Treatment Selection

Water Softener Systems are commonly used for treating hard water by removing minerals from water through ion exchange. It consists of a Mineral Tank, Control Valve and a Brine Tank. With time and depending on the hardness level of the water, the salt in the tanks may need to be replace as much as once a month. On top of this maintenance cost, the initial cost of the system is high.

Figure 13 Water Softener System

A cost effective, maintenance free solution to resolving this issue is to use a Coil Based Physical Water Treatment such as the Yarna CED48 Capacitive Electronic Water Descaler.

Figure 14 Yarna CED48 Capacitive Electronic Water Descaler

This solution protects metal against corrosion and works well for piping in soil. It works by sending electric waves to break down the crystals that causes limescale and transforms the minerals into ions. This results in a significant reduction in limescale.

Using a Flow-Tech Water Treatment System, we reduce limescale when installed at water supply entering the building. This is a cost-effective, low maintenance solution when compared to traditional water softener systems.

It works by creating a low frequency signal that is pulsed several thousand times per second. The signal neutralizes the charge on suspended particles which allows scale forming minerals to form seed crystals that is easily washed away.

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(a) (b) Figure 15 a) Flow-Tech used on main waterline and b) Comparison with Coil Based Physical Water Treatment

Flow-Tech Water

Softener No

Treatment

Prevents new scale on pipes and equipment X X

Removes existing scale X

Saves money X

Restores energy efficiency X

Reduces soap needs X X

No salt or chemical use X X

No storage, inventory management, or reloading

X X

No maintenance X

Safe for newborns and those with hypertension

X X

Retains beneficial minerals X X

Does not waste water or require replacement resin

X X

Recommended where softeners are banned X X

No added burden to water treatment plants X X

Environmentally friendly X X

Does not promote corrosion X X

Saves space X X

3-year warranty X

Table 5 Flow-Tech comparison table

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7.4. Boiler Options

For direct replacement of the boilers, our simulation results using IESVE tool indicated that the load for the space is 105 MBH per boiler. Based on this, we suggest three options for boiler selection and associated efficiency and costs as shown in Table 5:

Option 1 Option 2 Option 3

Efficiency High High High

Cost Low Med High

Make & Model Baxi Lochinvar Noble Lochinvar Knight Table 6 Low Cost (Option 1), Medium Range (Option 2), and High Efficiency (Option 3) Boilers Options

7.4.1. Low Cost Option

The Baxi Combi Boiler (a combination of ‘combi’ boiler is both a high efficiency water heater and a central heating boiler in a single compact unit) is an example of wall-mounted modulating on-demand, condensing boiler that gives an endless supply of hot water. It is cost-efficient as it only produces hot water when it is needed. It takes far less space than the current boilers and is traditionally used in larger homes or small buildings and/or offices. If high discharge temp unit(s) are selected, and when used in tandem configuration and coupled with a storage tanks(s), this type of unit could successfully be used in this system design.

Figure 6 Baxi Combi Boiler (Low cost option)

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7.4.2. Medium Cost Option The Lochinvar Noble Combi Boiler is a multi-material connector that allows any piping material to connect to the boiler directly without the needs of an adapter. The fire tube design has a higher heat transfer coefficient than traditional heat exchangers. It is commercial grade construction and has a rugged design for improved reliability and is typically used in small- to medium-sized facilities.

Figure 7 Lochinvar Noble Boiler (Medium Cost Option)

7.4.3. High Cost Option

The Lochinvar Knight High-Efficiency Boiler is an example of a top-of-the-line commercial boiler that comes in wall-mounted and floor-mounted version. It comes with a variable speed ECM pump that helps save electricity and lower operating cost. It also comes with smart features and is BMS compatible.

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Figure 8 Lochinvar Knight Boiler (High Cost/High Efficiency Option)

7.5. Domestic Hot Water Heater Selections

There are different Water Heaters the Design Studio have selected for different budgets and based on the distance between the Water Heater and fixtures requiring hot water.

The most cost-effective solution is to use a Combi Hydronic Boiler/Water Heater like the Lochinvar Knight mentioned in the Boilers section above. While this will avoid the need of have a separate fixture for Domestic Hot Water and reduce maintenance significantly, both the building heating and hot water would be compromised if the Combi unit(s) were to break down if a redundant unit isn’t supplied. Another issue is when at peak hot water demand, the Combi unit will prioritize hot water and reduce the building heating to compensate. A mixing valve could be added to offset this problem.

Due to a only few number of fixtures needing hot water, installing a Point of Use Instantaneous Water Heater is another energy and cost-efficient solution to consider. This avoids the need of having two storage tank water heaters or circulating pumps. They are compact design and can fit under a sink and are vandal resistant.

(a) (b) Figure 9 a) Current Method of supplying Hot Water and b) Using a point-of-use Chronomite

As the boiler room is in close proximity of water fixtures demanding hot water, using a storage type water heater similar to a Bock OT400 with a 119 gal storage tank would be sufficient and will allow for higher peak demands for short periods at 550.4 GPH. Hot water will reach the fixture in a short period of time.

Figure 10 Bock OT400 Storage Type Water Heater

7.5.1. Circulating Pumps

For the purpose of budgetary comparisons, a Circulating Pump should be considered for Storage Type Water Heater until a pipe analysis is conducted, similar to a B&G NBF-25 supplying will 5 GPM @ 15’ TDH (Total Develop Head).

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Figure 11 Intellihot iN501 Instantaneous Water Heater

For instantaneous water heater solutions, using a single Intellihot iN501 Water Heater or something similar will meet with hot water demands at maximum probable demand of 4 GPM. This Water Heater produces 16.1 GPM @ a 60F rise (40-105F).

Figure 12 Intellihot iN501 Instantaneous Water Heater

Make Model Type Input Max

Probable Demand

Tank Capacity

Lochinvar Knight Combi Boiler/DWH 110 MBH - 3.2 gal

Chronomite Instant-Flow Point of Use Electric

Tankless Water Heater

- - -

Bock OT400 Storage Type Water

Heater 400 MBH 9.17 GPM 119 gal

Intellihot iN501 Instantaneous Water

Heater 500 MBH 4 GPM -

Table 4 Domestic Water Heater Schedule

8. APPENDICES

1. Original Drawings—available at walk through. 2. BIM information Development based on existing drawings—available upon request. 3. 2019 Utility Bill Information–available at walk through.