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What is the most efficient Domestic Hot Water Heaters

Domestic Hot Water Heaters: Gas-fired domestic hot water heater (commercial), standard efficiency. Set in place only, Make additional allowances for pipe and combustion venting connections.

Subject: Plumbing - Sub Subject: Hot Water Heaters
Date: 6/22/2019 Status: SOLVED
8 answered / 52 voted, viewed icon 310 viewed.
Solved - The best Reply technician - Saturday, June 22, 2019 552

Gas-fired domestic hot water heater (commercial), standard efficiency.

Set in place only, Make additional allowances for pipe and combustion venting connections.
50 gal./ 95 gph P1@2.00 Ea 2,240.00 72.50 2,312.50
67 gal./106 gph P1@2.00 Ea 2,650.00 72.50 2,722.50
76 gal./175 gph P1@2.00 Ea 3,550.00 72.50 3,622.50
91 gal./291 gph P1@2.00 Ea 4,280.00 72.50 4,352.50

Gas-fired domestic hot water heater (commercial), energy miser.

Set in place only, Make additional allowances for pipe and combustion venting connections.
50 gal./ 95 gph P1@2.00 Ea 5,270.00 72.50 5,342.50
67 gal./106 gph P1@2.00 Ea 5,510.00 72.50 5,582.50
76 gal./175 gph P1@2.00 Ea 6,830.00 72.50 6,902.50
91 gal./291 gph P1@2.00 Ea 8,120.00 72.50 8,192.50

Tankless natural gas water heaters

Ambient pressure. DOE and UL rated. For residential, multi-dwelling and light commercial potable water applications.
Add the cost of piping, tempering valve, circulating pump, controls, and electrical connection, post-installation inspection by both the fire marshal and the mechanical inspector to validate federal, state and local energy tax credits or energy tax credit offsets. For larger arrays (laundries, institutional facilities, food processing plants), develop an estimate based on the required capacity and multiply these costs by the number of heaters required. Rated in Btus and gallons per minute capacity. (1 Mbh 1,000 Btus)
19.5-140 Mbh,
.75-5.8 Gpm P1@16.0 Ea 1,830.00 580.00 2,410.00
11-199 Mbh,
.5-7 Gpm P1@20.0 Ea 2,160.00 725.00 2,885.00
25-235 Mbh
.75-9.6 Gpm P1@20.0 Ea 2,160.00 725.00 2,885.00
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ANSWERS Write an Answer

❝What is the most efficient Domestic Hot Water Heaters❞ answers. technician asked first. Total 8 replies.

technician - Saturday, June 22, 2019 549
Description Craft@Hrs Unit Material Labor Equipment Total

Tankless electric point-of-use water heaters

Ambient pressure, DOE and UL rated. For residential, multi-dwelling and light commercial potable water applications. Cost does not include piping, tempering valve, circulating pump, controls, storage tank, electrical connection. Add the cost of post-installation inspection by the mechanical inspector to validate federal, state and local energy tax credits or energy tax credit offsets. In rated gallons per minute capacity.
5.5 Kw/40 Amp,
.75-2 Gpm P1@4.00 Ea 461.00 145.00 606.00
9.5 Kw/50 Amp
.75-2.5 Gpm P1@4.25 Ea 547.00 154.00 701.00
19 Kw/100 Amp
1-3.5 Gpm P1@4.50 Ea 909.00 163.00 1,072.00
28 Kw/120 Amp
1.5-5 Gpm P1@4.75 Ea 1,660.00 172.00 1,832.00

Domestic hot water heater connection assembly

Includes supply, return, recirculation and relief piping and fittings (copper), relief and isolation valves.
Make additional allowances for gas and venting connections where applicable.
¾❞ residential P1@1.75 Ea 313.00 63.40 376.40
¾❞ commercial P1@2.25 Ea 420.00 81.50 501.50
1❞ commercial P1@2.75 Ea 736.00 99.70 835.70
1¼❞ commercial P1@3.50 Ea 901.00 127.00 1,028.00
1½❞ commercial P1@3.75 Ea 938.00 136.00 1,074.00
2❞ commercial P1@4.50 Ea 1,000.00 163.00 1,163.00
2½❞ commercial P1@5.75 Ea 2,080.00 208.00 2,288.00
3❞ commercial P1@6.50 Ea 3,190.00 236.00 3,426.00

Domestic water heater combustion vent connection

Make additional allowances for piping distances greater than 25'.
2❞ B-vent P1@.090 LF 6.22 3.26 9.48
3❞ B-vent P1@.100 LF 7.69 3.62 11.31
4❞ B-vent P1@.110 LF 10.20 3.99 14.19
6❞ B-vent P1@.130 LF 11.60 4.71 16.31
Tankless heater
vent kit P1@2.50 Ea 437.00 90.60 527.60
Power vent kit P1@2.00 Ea 1,120.00 72.50 1,192.50
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Rhys - Monday, April 3, 2023 568
Informative and well-written 👌 🧐🐶 🐇 🖕

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Richard - Saturday, June 17, 2023 439
Legendary👋

.. The explanation was clear and satisfying😂
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Well-organized 😎❤

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Cameron Fisher - Sunday, October 29, 2023 300
The article was well-researched and well-written 🍉😄

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.. Engaging and well-researched 😇 😆👑
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Josh LA1994 - Sunday, November 19, 2023 211
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