Question 1

What's included in the $5,000 Navien replacement?

Accepted Answer

Colorado First Plumbing and Sewer LLC's $5,000 Navien replacement includes professional removal of your existing unit, installation of the new NPE-240A, gas and water connections up to 8 feet, flush valves for maintenance, and warranty activation. This applies when existing PVC venting is compatible.

Question 2

Does the NPE-240A have a recirculation pump?

Accepted Answer

Yes, the Navien NPE-240A includes a built-in recirculation pump and buffer tank. This significantly reduces wait time for hot water at fixtures, preventing "cold water sandwiches" and providing near-instant hot water when properly configured.

Question 3

What rebates are available for Navien tankless?

Accepted Answer

Colorado Natural Gas offers a $300 rebate for the Navien NPE-240A due to its 0.96 UEF rating. Additionally, you may qualify for a 30% federal tax credit (up to $600) for this high-efficiency unit. Colorado First Plumbing helps identify all available savings.

Question 4

Why does new installation cost $8,000?

Accepted Answer

The $8,000 includes upgrading your gas line from 1/2" to 3/4" for proper BTU delivery, installing complete PVC venting through the roof or wall, water line modifications, permits, and professional commissioning. Colorado First Plumbing ensures code compliance.

Question 5

What venting is used for Navien condensing units?

Accepted Answer

Navien NPE-240A uses 2" or 3" Schedule 40/80 PVC/CPVC piping for venting. The lower exhaust temperatures of condensing units allow for these less expensive materials compared to stainless steel required for non-condensing units.

Question 6

Are permits required for tankless installation?

Accepted Answer

Yes, the City and County of Denver and most Colorado jurisdictions require permits for water heater installation. Colorado First Plumbing and Sewer LLC handles all necessary permitting and inspections as part of our service.

Question 7

What venting does Rinnai RE180iN use?

Accepted Answer

Rinnai RE180iN uses Ubbink concentric venting with an aluminum inner pipe and white PVC outer shell for intake air. Colorado First Plumbing ensures proper venting installation for safe and efficient operation.

Question 8

Can I control my Rinnai with an app?

Accepted Answer

Yes, many Rinnai models are WiFi capable and connect via the Rinnai Central app. This allows remote temperature control, usage monitoring, and maintenance alerts from your smartphone.

Question 9

What's the difference between condensing and non-condensing?

Accepted Answer

Non-condensing units like the RE180iN have 82% efficiency and require metal venting. Condensing units achieve 96% efficiency by capturing exhaust heat and can use less expensive PVC venting. Both provide endless hot water.

Question 10

What gas line size does Rinnai require?

Accepted Answer

Most Rinnai tankless units, especially the RU199iN (199,000 BTUs) and RE180iN, require a 3/4" gas line for proper fuel delivery. Colorado First Plumbing upgrades existing 1/2" lines as part of the $8,000 installation.

Question 11

How often should I maintain my Rinnai tankless?

Accepted Answer

Due to Colorado's hard water, annual maintenance is essential. This involves flushing and descaling the heat exchanger to prevent scale buildup. Colorado First Plumbing provides maintenance services to protect your warranty.

Question 12

What does a Rinnai Code 10 error mean?

Accepted Answer

Code 10 indicates an air supply/exhaust blockage or full condensate trap. This could be from a clogged condensate line, freezing, or debris in the vent. Colorado First Plumbing diagnoses and resolves these issues quickly.

Question 13

How often should I flush my tankless unit in Colorado?

Accepted Answer

Colorado First Plumbing and Sewer LLC recommends annual flushing due to Colorado's hard water conditions. Areas with extremely hard water may benefit from bi-annual service. Regular maintenance prevents costly repairs and maintains warranty coverage.

Question 14

What happens if I skip annual maintenance?

Accepted Answer

Skipping maintenance can void your manufacturer warranty, reduce efficiency by 20-30%, cause hot water delivery issues, and lead to expensive heat exchanger replacement. The $225 annual service protects your $5,000-$8,000 investment.

Question 15

Is your descaling solution safe?

Accepted Answer

Yes, we use only food-grade descaling solutions that are safe for your family and the environment. These professional-grade solutions effectively remove mineral deposits without damaging internal components or leaving harmful residues.

Question 16

How long does the flushing service take?

Accepted Answer

Our comprehensive flushing service typically takes 1.5-2 hours, including setup, descaling circulation, thorough flushing, reconnection, and performance testing. We provide same-day service with minimal disruption to your routine.

Tankless Water Heater Cost in Denver Metro - $5,000 Upfront

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Standard Tankless Water Heater - $5,000

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